What acid is produced by plant roots

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg

What lessons does the history and study of the periodic table offer to other fields of science, and the pursuit science more generally